Add logic to check the execution break flag before executing the next command in a script file.
Add logic to check the execution break flag before executing the next command in a script file.

Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Jaben carsey <Jaben.carsey@intel.com>

git-svn-id: 5648d1bec6962b0a6d1d1b40eba8cf5cdb62da3d@13547 6f19259b-4bc3-4df7-8a09-765794883524

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2